Update I18N.md

Author: MarkusBordihn

doc/I18N.md

@@ -68,7 +68,7 @@ closureBuilder.build({
 
 ### Adjust Blockly translation build rule
 
-Adjust the *Blockly translation* build rule in the file 
+Adjust the *Blockly translation* build rule in the file
 `build/external/extra_files.js` to include the new supported language.
 
 Example for the "deu" translation:
@@ -88,7 +88,6 @@ closureBuilder.build({
 });
 ```
 
-
 Additional language support
 ----------------------------